john adams" put it best. >> i am vice president, yes, and in this i am nothing, but i may be everything. >> reporter: over there years, there have been some sordid characters in the office. vice president tompkinss number two, was often so drunk presiding over the senate that congress refused to pay his 23full salary. vice president dan quayle had some real responsibilities but he may be best remembered for this ill-fated spelling lesson. >> potato. >> reporter: at the '92 v.p. debate, perot's running mate may have unwittingly spoken for all v.p.s. >> who am i? why am i here? >> reporter: more recently, vice presidents have become more important. dick cheney was so powerful some actually thought he was pulling the strings in the oval office. >> i am as thrilled as is medically prudent for me to be to have been elected your new vice president. >> reporter: but powerful or not, the v.p. is still good for a few laughs. >> you are a great vice president. >> well some people say i would make a great president. better than you even. >> reporr: jonathan karl, abc news, danville, kentucky. >> the debate, coming up, 9:00 p.m. eastern, 6:00 pacific. our own martha raddatz moderates. george stephanopoulos